US3041768A

US3041768A - Firearm with trigger assembly and slide arm assembly supported by barrel lug

Info

Publication number: US3041768A
Application number: US53405A
Authority: US
Inventors: Jr Julius E Brooks
Original assignee: Olin Corp
Current assignee: Olin Corp
Priority date: 1960-09-01
Filing date: 1960-09-01
Publication date: 1962-07-03
Anticipated expiration: 1979-07-03
Also published as: BE628626A

Description

July 3, 1962 J. E. BROOKS, JR

FIREARM WITH TRIGGER ASSEMBLY AND SLIDE ARM ASSEMBLY SUPPORTED BY BARREL LUG Filed Sept. 1, 1960 INVENTOR JULIUS E. BROOKS JR.

United States Patent 3,041,768 FREARM WITH TRIGGER ASSEMBLY AND SLIDE ARM ASSEMBLY SUFPORTED BY BARREL LUG Julius E. Brooks, Jr., Branford, Conn., assignor to Olin Mathieson Chemical Corporation, a corporation of Virginia Filed Sept. 1, 1960, Ser. No. 53,405

Claims. (Cl. 4216) The present invention relates to slide action firearmssometimes referred to as pump guns.

A particular feature of the present invention is the provision of a novel take-down assembly.

A further feature of the invention is the provision of a slide action firearm wherein the forearm portion of the action is suspended in a novel fashion.

A further feature of the invention is the provision of a slide action firearm wherein the forearm while disposed in the actuated position, relative to the barrel, presents an exterior appearance which is entirely free of guide rods, rails, or tracks,

A further feature of the invention is the provision of a slide action forearm structure movable from a forward position corresponding a firing position to a rear position corresponding to an ejection position wherein the gun action is entirely enclosed within the forearm at both positions.

A firearm embracing certain features of the present invention and having novel take-down characteristics may comprise a barrel including a depending lug suitably connected to a receiver, a trigger assembly including a pair of spaced rails removably connected to the receiver and to the barrel wherein one end of the assembly engages the lug and the opposite end thereof engages the receiver, a slide arm assembly including a pair of slide arms carried by the rails and removably connected to the lug, a forearm rigidly secured to the slide arm assembly, said forearm cooperating with the barrel effective to enclose the slide arms so that when the forearm is moved from a firing position to an ejection position, the underside of the barrel is entirely free of guide rods and similar members.

Other features and advantages of the present invention will become more apparent from an examination of the succeeding specification when read in conjunction with the appended drawings in which:

FIG. 1 is a side view of a portion of a firearm embracing the principles of the present invention with certain portions thereof broken away for clarity;

FIG. 2 is an illustration similar to FIG. 1 showing the forearm in the ejection position;

FIG. 3 is a view of the underside of the arrangement shown in FIG. 2 with the forearm removed, and,

FIG. 4 is a vertical section taken along the lines 44 in FIG. 2 showing the cooperation between the slide arm assembly and the forearm.

Referring now in detail to the drawing, a receiver is shown in threaded engagement with a barrel 11 carrying a depending lug 12 formed with a pair of undercut

circular grooves

13 and 14.

A trigger assembly 16 includes a trigger guard 17, spaced slide rails 1818, bridge member 19 and connector tab 21.

The rear or left end of the trigger assembly 16 is fastened to the receiver by means of a through pin 22 while the forward end thereof is secured to the barrel by the engagement of an elongated slot 23 formed in the tab 21 with the undercut groove 14 of the lug 12.

A bolt 24 is disposed in the receiver and is actuated in well known fashion by a slide arm assembly, indicated generally by the reference numeral 26.

The slide arm assembly comprises a guide portion 27 having an elongated slot 28 operative to engage and move along, in reciprocatory fashion, relative to the lug 12 wherein the guide 27 rides in the undercut groove 13.

As is most apparent in FIGS. 1, 3 and 4, the guide 27 includes a pair of opposed, upwardly flared

wings

29 and 31 operative to engage corresponding ways '32 and 33 formed in a forearm 34.

The forearm is rigidly connected to the guide 27 of the slide arm assembly by means of a fastener 36.

Thus, the forward portion of the forearm is supported by the fastener 36 While the rear portion thereof is supported or carried by the cooperation between the

flared wings

29 and 31 and the Ways 32 and 33.

When the forearm is moved from the firing position shown in FIG. 1 to the ejection position shown in FIG. 2, the bridge member 19 of the trigger assembly is received within and guides the forearm while the slide arm assembly is driven to the left as viewed in FIGS. 1 and 2 to move bolt 24 from a closed position to an open position.

Note that the connection between the bolt and the slide arm is accomplished by the cooperation between a saddle 37 bridging spaced slide arms 3939 (only one shown) and a corresponding notch 38 cut out of the bolt.

As the forearm reciprocates to and fro between the position shown in FIG. 1 and FIG. 2, the guide 27 slides along the groove 13 in the lug 12 while the slide arms 3939 move along and are supported by the rails 18- 18, as is most apparent in FIG. 1.

By virtue of the slide action arrangement just described, it is possible to manipulatethe forearm from a firing position to an ejection position without exposing unsightly elements of the action.

Note that when the slide arm is in the ejection position shown in FIG. 2, there are no rod pins or other guide members extending through the forearm or depending from the barrel.

To take down the action of the present invention, one merely removes the threaded fastener 36 from the forward portion of the guide 27.

Thereafter the forearm may be removed to the right relative to the guide 27 to withdraw it from engagement with the

flared wings

29 and 31 of the slide arm assembly.

The next step is to tap out the pin 22 releasing the left end of the trigger assembly from the receiver.

Thereafter one shifts the trigger assembly to the right, as viewed in FIG. 1, so that the enlarged portion 43 of the slot indicated generally by the reference numeral 23 in the tab 21 permits the tab to drop downwardly clear of the lug 12.

Upon removal of the trigger assembly, the slide arms 39 are free to drop downwardly a sufficient distance to permit disengagement between the bolt 24 and the saddle 37.

Thereafter slight motion of the slide arm assembly 26 to the right as viewed in FIG. 1 will present an enlarged opening 44 to the lug 12, and this will permit the right end of the slide arm assembly to drop free of the lug in the same manner as described in connection with the locking tab 21.

In an alternative arrangement of the present invention, the bolt 24 is formed integrally with the slide arm assembly 26 and the enlarged opening 44 is located at the point designated 44' in FIG. 1.

The take-down steps are varied so that removal of the combined bolt and slide arm assembly is effected by sliding the combined assembly to the ejection position. The enlarged opening 44 permits the right end of the assembly to drop clear of the lug 12 and the combined bolt and slide arm assembly is then drawn to the right and removed.

The firearm is assembled by reversing the steps just described.

What is claimed is:

1. In a slide action firearm including a barrel having opposed ends, a trigger assembly and a receiver, a forearm movable relative to the barrel from a firing position to an ejection position, said trigger assembly being removably secured to the receiver and to the barrel, said trigger assembly being suspended and supported at a point on the receiver and at a spaced point located between the ends of the barrel, a slide arm assembly carried by the trigger assembly and keyed to the barrel at said spaced point, said slide arm assembly being movable in reciprocatory fashion relative to said trigger assembly and relative to said barrel, said forearm secured to said slide arm assembly and cooperating with the barrel to enclose the slide arm assembly so that when the forearm moves from one position to the other, marginal regions surrounding the barrel are entirely free of obstructions or protuberances.

2. The firearm of claim 1 wherein the trigger assembly includes a pair of rails upon which the slide arm assembly is slidably carried.

3. The firearm of claim 1 wherein said slide arm assembly is formed with wings operative to carry the fore- 25 arm.

4. A slide action firearm having desirable takedown features comprising a barrel having a depending lug, a receiver, a slide arm assembly operable to engage the lug and move relative thereto, a forearm connected to the slide arm assembly and movable in reciprocatory fashion along the barrel in company with the slide arm assembly, a trigger assembly including a pair of spaced rails operative to provide a track for the slide assembly and a guide for said forearm, said trigger assembly being connected at one end to the receiver and at the other end to said depending lug, said slide arm assembly 'having flaring side Walls operative to cooperate with and engage mating recesses formed in the forearm to provide support for the forearm.

5. The firearm of claim 1 wherein the slide arm assembly includes bolt means integrally connected thereto.

References Cited in the file of this patent UNITED STATES PATENTS 1,110,837 Swebilius et al. Sept. 15, 1914 2,832,165 Ivy Apr. 29, 1958 2,922,240 Allyn Jan. 26, 1960 FOREIGN PATENTS 148,719 Great Britain Aug. 5, 1920